/ Dictionary / Index D Derleth: Meaning and Definition of Find definitions for: Der•leth Pronunciation: (dûr'leth, -luth), [key] 1909–71, U.S. novelist, poet, and short-story writer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. derived unit derm Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language